Claim 7 of 13 · Case 08 · Science
The basic constants of physics sit in narrow ranges that allow stars, chemistry, and life, and shifting them even slightly would rule life out.
One claim from the free evidence repository at apologetics.pro.
When physicists examine the fundamental numbers built into nature, several of them land inside very narrow windows that permit a life bearing universe. Change them a little and you get no stars, no stable chemistry, and no observers. This observation, called fine tuning, is widely acknowledged across the worldview spectrum. Two honest limits. Saying fine tuning is real means only that the constants do sit in narrow ranges, not that design is proven. And a minority of physicists dispute how the case is framed, arguing that some constants are less constrained than claimed, or that other forms of life might be possible.
Backed by 2 pieces of evidence
Luke Barnes’s review of the fine-tuning literature
This is a careful technical source rather than a popular one, and it engages a critic head on. That makes it strong support for the modest claim that fine tuning is a real, recognized feature of physics.The cosmological constant
This gives the claim its most striking concrete number. The precision involved is what makes fine tuning cry out for some explanation.